What is the Greatest Common Factor of 66381 and 66390?

Greatest common factor (GCF) of 66381 and 66390 is 3.

GCF(66381,66390) = 3

We will now calculate the prime factors of 66381 and 66390, than find the greatest common factor (greatest common divisor (gcd)) of the numbers by matching the biggest common factor of 66381 and 66390.

How to find the GCF of 66381 and 66390?

We will first find the prime factorization of 66381 and 66390. After we will calculate the factors of 66381 and 66390 and find the biggest common factor number .

Step-1: Prime Factorization of 66381

Prime factors of 66381 are 3, 7, 29, 109. Prime factorization of 66381 in exponential form is:

66381 = 3¹ × 7¹ × 29¹ × 109¹

Step-2: Prime Factorization of 66390

Prime factors of 66390 are 2, 3, 5, 2213. Prime factorization of 66390 in exponential form is:

66390 = 2¹ × 3¹ × 5¹ × 2213¹

Step-3: Factors of 66381

List of positive integer factors of 66381 that divides 66381 without a remainder.

1, 3, 7, 21, 29, 87, 109, 203, 327, 609, 763, 2289, 3161, 9483, 22127

Step-4: Factors of 66390

List of positive integer factors of 66390 that divides 66381 without a remainder.

1, 2, 3, 5, 6, 10, 15, 30, 2213, 4426, 6639, 11065, 13278, 22130, 33195

Final Step: Biggest Common Factor Number

We found the factors and prime factorization of 66381 and 66390. The biggest common factor number is the GCF number.
So the greatest common factor 66381 and 66390 is 3.

Also check out the Least Common Multiple of 66381 and 66390